#define PNG_INTERNAL
#include "png.h"

png_uint_32 PNGAPI
png_get_valid( png_structp png_ptr, png_infop info_ptr, png_uint_32 flag ) {
  if( png_ptr != NULL && info_ptr != NULL ) {
    return( info_ptr->valid & flag );
  } else
  { return( 0 ); }
}

png_uint_32 PNGAPI
png_get_rowbytes( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL ) {
    return( info_ptr->rowbytes );
  } else
  { return( 0 ); }
}

#if defined(PNG_INFO_IMAGE_SUPPORTED)
png_bytepp PNGAPI
png_get_rows( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL ) {
    return( info_ptr->row_pointers );
  } else
  { return( 0 ); }
}
#endif

#ifdef PNG_EASY_ACCESS_SUPPORTED
png_uint_32 PNGAPI
png_get_image_width( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL ) {
    return info_ptr->width;
  }
  return ( 0 );
}

png_uint_32 PNGAPI
png_get_image_height( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL ) {
    return info_ptr->height;
  }
  return ( 0 );
}

png_byte PNGAPI
png_get_bit_depth( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL ) {
    return info_ptr->bit_depth;
  }
  return ( 0 );
}

png_byte PNGAPI
png_get_color_type( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL ) {
    return info_ptr->color_type;
  }
  return ( 0 );
}

png_byte PNGAPI
png_get_filter_type( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL ) {
    return info_ptr->filter_type;
  }
  return ( 0 );
}

png_byte PNGAPI
png_get_interlace_type( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL ) {
    return info_ptr->interlace_type;
  }
  return ( 0 );
}

png_byte PNGAPI
png_get_compression_type( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL ) {
    return info_ptr->compression_type;
  }
  return ( 0 );
}

png_uint_32 PNGAPI
png_get_x_pixels_per_meter( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL )
  #if defined(PNG_pHYs_SUPPORTED)
    if( info_ptr->valid & PNG_INFO_pHYs ) {
      png_debug1( 1, "in %s retrieval function\n", "png_get_x_pixels_per_meter" );
      if( info_ptr->phys_unit_type != PNG_RESOLUTION_METER ) { return ( 0 ); }
      else
      { return ( info_ptr->x_pixels_per_unit ); }
    }
  #else
    return ( 0 );
  #endif
  return ( 0 );
}

png_uint_32 PNGAPI
png_get_y_pixels_per_meter( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL )
  #if defined(PNG_pHYs_SUPPORTED)
    if( info_ptr->valid & PNG_INFO_pHYs ) {
      png_debug1( 1, "in %s retrieval function\n", "png_get_y_pixels_per_meter" );
      if( info_ptr->phys_unit_type != PNG_RESOLUTION_METER ) { return ( 0 ); }
      else
      { return ( info_ptr->y_pixels_per_unit ); }
    }
  #else
    return ( 0 );
  #endif
  return ( 0 );
}

png_uint_32 PNGAPI
png_get_pixels_per_meter( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL )
  #if defined(PNG_pHYs_SUPPORTED)
    if( info_ptr->valid & PNG_INFO_pHYs ) {
      png_debug1( 1, "in %s retrieval function\n", "png_get_pixels_per_meter" );
      if( info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
          info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit ) { return ( 0 ); }
      else
      { return ( info_ptr->x_pixels_per_unit ); }
    }
  #else
    return ( 0 );
  #endif
  return ( 0 );
}

#ifdef PNG_FLOATING_POINT_SUPPORTED
float PNGAPI
png_get_pixel_aspect_ratio( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL )
  #if defined(PNG_pHYs_SUPPORTED)
    if( info_ptr->valid & PNG_INFO_pHYs ) {
      png_debug1( 1, "in %s retrieval function\n", "png_get_aspect_ratio" );
      if( info_ptr->x_pixels_per_unit == 0 ) { return ( ( float )0.0 ); }
      else
        return ( ( float )( ( float )info_ptr->y_pixels_per_unit
                            / ( float )info_ptr->x_pixels_per_unit ) );
    }
  #else
    return ( 0.0 );
  #endif
  return ( ( float )0.0 );
}
#endif

png_int_32 PNGAPI
png_get_x_offset_microns( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL )
  #if defined(PNG_oFFs_SUPPORTED)
    if( info_ptr->valid & PNG_INFO_oFFs ) {
      png_debug1( 1, "in %s retrieval function\n", "png_get_x_offset_microns" );
      if( info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER ) { return ( 0 ); }
      else
      { return ( info_ptr->x_offset ); }
    }
  #else
    return ( 0 );
  #endif
  return ( 0 );
}

png_int_32 PNGAPI
png_get_y_offset_microns( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL )
  #if defined(PNG_oFFs_SUPPORTED)
    if( info_ptr->valid & PNG_INFO_oFFs ) {
      png_debug1( 1, "in %s retrieval function\n", "png_get_y_offset_microns" );
      if( info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER ) { return ( 0 ); }
      else
      { return ( info_ptr->y_offset ); }
    }
  #else
    return ( 0 );
  #endif
  return ( 0 );
}

png_int_32 PNGAPI
png_get_x_offset_pixels( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL )
  #if defined(PNG_oFFs_SUPPORTED)
    if( info_ptr->valid & PNG_INFO_oFFs ) {
      png_debug1( 1, "in %s retrieval function\n", "png_get_x_offset_microns" );
      if( info_ptr->offset_unit_type != PNG_OFFSET_PIXEL ) { return ( 0 ); }
      else
      { return ( info_ptr->x_offset ); }
    }
  #else
    return ( 0 );
  #endif
  return ( 0 );
}

png_int_32 PNGAPI
png_get_y_offset_pixels( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL )
  #if defined(PNG_oFFs_SUPPORTED)
    if( info_ptr->valid & PNG_INFO_oFFs ) {
      png_debug1( 1, "in %s retrieval function\n", "png_get_y_offset_microns" );
      if( info_ptr->offset_unit_type != PNG_OFFSET_PIXEL ) { return ( 0 ); }
      else
      { return ( info_ptr->y_offset ); }
    }
  #else
    return ( 0 );
  #endif
  return ( 0 );
}

#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
png_uint_32 PNGAPI
png_get_pixels_per_inch( png_structp png_ptr, png_infop info_ptr ) {
  return ( ( png_uint_32 )( ( float )png_get_pixels_per_meter( png_ptr, info_ptr )
                            * .0254 + .5 ) );
}

png_uint_32 PNGAPI
png_get_x_pixels_per_inch( png_structp png_ptr, png_infop info_ptr ) {
  return ( ( png_uint_32 )( ( float )png_get_x_pixels_per_meter( png_ptr, info_ptr )
                            * .0254 + .5 ) );
}

png_uint_32 PNGAPI
png_get_y_pixels_per_inch( png_structp png_ptr, png_infop info_ptr ) {
  return ( ( png_uint_32 )( ( float )png_get_y_pixels_per_meter( png_ptr, info_ptr )
                            * .0254 + .5 ) );
}

float PNGAPI
png_get_x_offset_inches( png_structp png_ptr, png_infop info_ptr ) {
  return ( ( float )png_get_x_offset_microns( png_ptr, info_ptr )
           * .00003937 );
}

float PNGAPI
png_get_y_offset_inches( png_structp png_ptr, png_infop info_ptr ) {
  return ( ( float )png_get_y_offset_microns( png_ptr, info_ptr )
           * .00003937 );
}

#if defined(PNG_pHYs_SUPPORTED)
png_uint_32 PNGAPI
png_get_pHYs_dpi( png_structp png_ptr, png_infop info_ptr,
                  png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type ) {
  png_uint_32 retval = 0;
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_pHYs ) ) {
    png_debug1( 1, "in %s retrieval function\n", "pHYs" );
    if( res_x != NULL ) {
      *res_x = info_ptr->x_pixels_per_unit;
      retval |= PNG_INFO_pHYs;
    }
    if( res_y != NULL ) {
      *res_y = info_ptr->y_pixels_per_unit;
      retval |= PNG_INFO_pHYs;
    }
    if( unit_type != NULL ) {
      *unit_type = ( int )info_ptr->phys_unit_type;
      retval |= PNG_INFO_pHYs;
      if( *unit_type == 1 ) {
        if( res_x != NULL ) { *res_x = ( png_uint_32 )( *res_x * .0254 + .50 ); }
        if( res_y != NULL ) { *res_y = ( png_uint_32 )( *res_y * .0254 + .50 ); }
      }
    }
  }
  return ( retval );
}
#endif /* PNG_pHYs_SUPPORTED */
#endif  /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */

/* png_get_channels really belongs in here, too, but it's been around longer */

#endif  /* PNG_EASY_ACCESS_SUPPORTED */

png_byte PNGAPI
png_get_channels( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL ) {
    return( info_ptr->channels );
  } else
  { return ( 0 ); }
}

png_bytep PNGAPI
png_get_signature( png_structp png_ptr, png_infop info_ptr ) {
  if( png_ptr != NULL && info_ptr != NULL ) {
    return( info_ptr->signature );
  } else
  { return ( NULL ); }
}

#if defined(PNG_bKGD_SUPPORTED)
png_uint_32 PNGAPI
png_get_bKGD( png_structp png_ptr, png_infop info_ptr,
              png_color_16p *background ) {
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_bKGD )
      && background != NULL ) {
    png_debug1( 1, "in %s retrieval function\n", "bKGD" );
    *background = &( info_ptr->background );
    return ( PNG_INFO_bKGD );
  }
  return ( 0 );
}
#endif

#if defined(PNG_cHRM_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_cHRM( png_structp png_ptr, png_infop info_ptr,
              double *white_x, double *white_y, double *red_x, double *red_y,
              double *green_x, double *green_y, double *blue_x, double *blue_y ) {
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_cHRM ) ) {
    png_debug1( 1, "in %s retrieval function\n", "cHRM" );
    if( white_x != NULL ) {
      *white_x = ( double )info_ptr->x_white;
    }
    if( white_y != NULL ) {
      *white_y = ( double )info_ptr->y_white;
    }
    if( red_x != NULL ) {
      *red_x = ( double )info_ptr->x_red;
    }
    if( red_y != NULL ) {
      *red_y = ( double )info_ptr->y_red;
    }
    if( green_x != NULL ) {
      *green_x = ( double )info_ptr->x_green;
    }
    if( green_y != NULL ) {
      *green_y = ( double )info_ptr->y_green;
    }
    if( blue_x != NULL ) {
      *blue_x = ( double )info_ptr->x_blue;
    }
    if( blue_y != NULL ) {
      *blue_y = ( double )info_ptr->y_blue;
    }
    return ( PNG_INFO_cHRM );
  }
  return ( 0 );
}
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_cHRM_fixed( png_structp png_ptr, png_infop info_ptr,
                    png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
                    png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
                    png_fixed_point *blue_x, png_fixed_point *blue_y ) {
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_cHRM ) ) {
    png_debug1( 1, "in %s retrieval function\n", "cHRM" );
    if( white_x != NULL ) {
      *white_x = info_ptr->int_x_white;
    }
    if( white_y != NULL ) {
      *white_y = info_ptr->int_y_white;
    }
    if( red_x != NULL ) {
      *red_x = info_ptr->int_x_red;
    }
    if( red_y != NULL ) {
      *red_y = info_ptr->int_y_red;
    }
    if( green_x != NULL ) {
      *green_x = info_ptr->int_x_green;
    }
    if( green_y != NULL ) {
      *green_y = info_ptr->int_y_green;
    }
    if( blue_x != NULL ) {
      *blue_x = info_ptr->int_x_blue;
    }
    if( blue_y != NULL ) {
      *blue_y = info_ptr->int_y_blue;
    }
    return ( PNG_INFO_cHRM );
  }
  return ( 0 );
}
#endif
#endif

#if defined(PNG_gAMA_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_gAMA( png_structp png_ptr, png_infop info_ptr, double *file_gamma ) {
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_gAMA )
      && file_gamma != NULL ) {
    png_debug1( 1, "in %s retrieval function\n", "gAMA" );
    *file_gamma = ( double )info_ptr->gamma;
    return ( PNG_INFO_gAMA );
  }
  return ( 0 );
}
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_gAMA_fixed( png_structp png_ptr, png_infop info_ptr,
                    png_fixed_point *int_file_gamma ) {
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_gAMA )
      && int_file_gamma != NULL ) {
    png_debug1( 1, "in %s retrieval function\n", "gAMA" );
    *int_file_gamma = info_ptr->int_gamma;
    return ( PNG_INFO_gAMA );
  }
  return ( 0 );
}
#endif
#endif

#if defined(PNG_sRGB_SUPPORTED)
png_uint_32 PNGAPI
png_get_sRGB( png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent ) {
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_sRGB )
      && file_srgb_intent != NULL ) {
    png_debug1( 1, "in %s retrieval function\n", "sRGB" );
    *file_srgb_intent = ( int )info_ptr->srgb_intent;
    return ( PNG_INFO_sRGB );
  }
  return ( 0 );
}
#endif

#if defined(PNG_iCCP_SUPPORTED)
png_uint_32 PNGAPI
png_get_iCCP( png_structp png_ptr, png_infop info_ptr,
              png_charpp name, int *compression_type,
              png_charpp profile, png_uint_32 *proflen ) {
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_iCCP )
      && name != NULL && profile != NULL && proflen != NULL ) {
    png_debug1( 1, "in %s retrieval function\n", "iCCP" );
    *name = info_ptr->iccp_name;
    *profile = info_ptr->iccp_profile;
    /* compression_type is a dummy so the API won't have to change
      if we introduce multiple compression types later. */
    *proflen = ( int )info_ptr->iccp_proflen;
    *compression_type = ( int )info_ptr->iccp_compression;
    return ( PNG_INFO_iCCP );
  }
  return ( 0 );
}
#endif

#if defined(PNG_sPLT_SUPPORTED)
png_uint_32 PNGAPI
png_get_sPLT( png_structp png_ptr, png_infop info_ptr,
              png_sPLT_tpp spalettes ) {
  if( png_ptr != NULL && info_ptr != NULL && spalettes != NULL ) {
    *spalettes = info_ptr->splt_palettes;
  }
  return ( ( png_uint_32 )info_ptr->splt_palettes_num );
}
#endif

#if defined(PNG_hIST_SUPPORTED)
png_uint_32 PNGAPI
png_get_hIST( png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist ) {
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_hIST )
      && hist != NULL ) {
    png_debug1( 1, "in %s retrieval function\n", "hIST" );
    *hist = info_ptr->hist;
    return ( PNG_INFO_hIST );
  }
  return ( 0 );
}
#endif

png_uint_32 PNGAPI
png_get_IHDR( png_structp png_ptr, png_infop info_ptr,
              png_uint_32 *width, png_uint_32 *height, int *bit_depth,
              int *color_type, int *interlace_type, int *compression_type,
              int *filter_type )

{
  if( png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL &&
      bit_depth != NULL && color_type != NULL ) {
    png_debug1( 1, "in %s retrieval function\n", "IHDR" );
    *width = info_ptr->width;
    *height = info_ptr->height;
    *bit_depth = info_ptr->bit_depth;
    if( info_ptr->bit_depth < 1 || info_ptr->bit_depth > 16 ) {
      png_error( png_ptr, "Invalid bit depth" );
    }
    *color_type = info_ptr->color_type;
    if( info_ptr->color_type > 6 ) {
      png_error( png_ptr, "Invalid color type" );
    }
    if( compression_type != NULL ) {
      *compression_type = info_ptr->compression_type;
    }
    if( filter_type != NULL ) {
      *filter_type = info_ptr->filter_type;
    }
    if( interlace_type != NULL ) {
      *interlace_type = info_ptr->interlace_type;
    }
    /* check for potential overflow of rowbytes */
    if( width == 0 || *width > PNG_UINT_31_MAX ) {
      png_error( png_ptr, "Invalid image width" );
    }
    if( height == 0 || *height > PNG_UINT_31_MAX ) {
      png_error( png_ptr, "Invalid image height" );
    }
    if( info_ptr->width > ( PNG_UINT_32_MAX
                            >> 3 )     /* 8-byte RGBA pixels */
        - 64       /* bigrowbuf hack */
        - 1        /* filter byte */
        - 7 * 8    /* rounding of width to multiple of 8 pixels */
        - 8 ) {    /* extra max_pixel_depth pad */
      png_warning( png_ptr,
                   "Width too large for libpng to process image data." );
    }
    return ( 1 );
  }
  return ( 0 );
}

#if defined(PNG_oFFs_SUPPORTED)
png_uint_32 PNGAPI
png_get_oFFs( png_structp png_ptr, png_infop info_ptr,
              png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type ) {
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_oFFs )
      && offset_x != NULL && offset_y != NULL && unit_type != NULL ) {
    png_debug1( 1, "in %s retrieval function\n", "oFFs" );
    *offset_x = info_ptr->x_offset;
    *offset_y = info_ptr->y_offset;
    *unit_type = ( int )info_ptr->offset_unit_type;
    return ( PNG_INFO_oFFs );
  }
  return ( 0 );
}
#endif

#if defined(PNG_pCAL_SUPPORTED)
png_uint_32 PNGAPI
png_get_pCAL( png_structp png_ptr, png_infop info_ptr,
              png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
              png_charp *units, png_charpp *params ) {
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_pCAL )
      && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
      nparams != NULL && units != NULL && params != NULL ) {
    png_debug1( 1, "in %s retrieval function\n", "pCAL" );
    *purpose = info_ptr->pcal_purpose;
    *X0 = info_ptr->pcal_X0;
    *X1 = info_ptr->pcal_X1;
    *type = ( int )info_ptr->pcal_type;
    *nparams = ( int )info_ptr->pcal_nparams;
    *units = info_ptr->pcal_units;
    *params = info_ptr->pcal_params;
    return ( PNG_INFO_pCAL );
  }
  return ( 0 );
}
#endif

#if defined(PNG_sCAL_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_sCAL( png_structp png_ptr, png_infop info_ptr,
              int *unit, double *width, double *height ) {
  if( png_ptr != NULL && info_ptr != NULL &&
      ( info_ptr->valid & PNG_INFO_sCAL ) ) {
    *unit = info_ptr->scal_unit;
    *width = info_ptr->scal_pixel_width;
    *height = info_ptr->scal_pixel_height;
    return ( PNG_INFO_sCAL );
  }
  return( 0 );
}
#else
#ifdef PNG_FIXED_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_sCAL_s( png_structp png_ptr, png_infop info_ptr,
                int *unit, png_charpp width, png_charpp height ) {
  if( png_ptr != NULL && info_ptr != NULL &&
      ( info_ptr->valid & PNG_INFO_sCAL ) ) {
    *unit = info_ptr->scal_unit;
    *width = info_ptr->scal_s_width;
    *height = info_ptr->scal_s_height;
    return ( PNG_INFO_sCAL );
  }
  return( 0 );
}
#endif
#endif
#endif

#if defined(PNG_pHYs_SUPPORTED)
png_uint_32 PNGAPI
png_get_pHYs( png_structp png_ptr, png_infop info_ptr,
              png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type ) {
  png_uint_32 retval = 0;
  if( png_ptr != NULL && info_ptr != NULL &&
      ( info_ptr->valid & PNG_INFO_pHYs ) ) {
    png_debug1( 1, "in %s retrieval function\n", "pHYs" );
    if( res_x != NULL ) {
      *res_x = info_ptr->x_pixels_per_unit;
      retval |= PNG_INFO_pHYs;
    }
    if( res_y != NULL ) {
      *res_y = info_ptr->y_pixels_per_unit;
      retval |= PNG_INFO_pHYs;
    }
    if( unit_type != NULL ) {
      *unit_type = ( int )info_ptr->phys_unit_type;
      retval |= PNG_INFO_pHYs;
    }
  }
  return ( retval );
}
#endif

png_uint_32 PNGAPI
png_get_PLTE( png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
              int *num_palette ) {
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_PLTE )
      && palette != NULL ) {
    png_debug1( 1, "in %s retrieval function\n", "PLTE" );
    *palette = info_ptr->palette;
    *num_palette = info_ptr->num_palette;
    png_debug1( 3, "num_palette = %d\n", *num_palette );
    return ( PNG_INFO_PLTE );
  }
  return ( 0 );
}

#if defined(PNG_sBIT_SUPPORTED)
png_uint_32 PNGAPI
png_get_sBIT( png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit ) {
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_sBIT )
      && sig_bit != NULL ) {
    png_debug1( 1, "in %s retrieval function\n", "sBIT" );
    *sig_bit = &( info_ptr->sig_bit );
    return ( PNG_INFO_sBIT );
  }
  return ( 0 );
}
#endif

#if defined(PNG_TEXT_SUPPORTED)
png_uint_32 PNGAPI
png_get_text( png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
              int *num_text ) {
  if( png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0 ) {
    png_debug1( 1, "in %s retrieval function\n",
                ( png_ptr->chunk_name[0] == '\0' ? "text"
                  : ( png_const_charp )png_ptr->chunk_name ) );
    if( text_ptr != NULL ) {
      *text_ptr = info_ptr->text;
    }
    if( num_text != NULL ) {
      *num_text = info_ptr->num_text;
    }
    return ( ( png_uint_32 )info_ptr->num_text );
  }
  if( num_text != NULL ) {
    *num_text = 0;
  }
  return( 0 );
}
#endif

#if defined(PNG_tIME_SUPPORTED)
png_uint_32 PNGAPI
png_get_tIME( png_structp png_ptr, png_infop info_ptr, png_timep *mod_time ) {
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_tIME )
      && mod_time != NULL ) {
    png_debug1( 1, "in %s retrieval function\n", "tIME" );
    *mod_time = &( info_ptr->mod_time );
    return ( PNG_INFO_tIME );
  }
  return ( 0 );
}
#endif

#if defined(PNG_tRNS_SUPPORTED)
png_uint_32 PNGAPI
png_get_tRNS( png_structp png_ptr, png_infop info_ptr,
              png_bytep *trans, int *num_trans, png_color_16p *trans_values ) {
  png_uint_32 retval = 0;
  if( png_ptr != NULL && info_ptr != NULL && ( info_ptr->valid & PNG_INFO_tRNS ) ) {
    png_debug1( 1, "in %s retrieval function\n", "tRNS" );
    if( info_ptr->color_type == PNG_COLOR_TYPE_PALETTE ) {
      if( trans != NULL ) {
        *trans = info_ptr->trans;
        retval |= PNG_INFO_tRNS;
      }
      if( trans_values != NULL ) { *trans_values = &( info_ptr->trans_values ); }
    } else {
      if( trans_values != NULL ) {
        *trans_values = &( info_ptr->trans_values );
        retval |= PNG_INFO_tRNS;
      }
      if( trans != NULL ) { *trans = NULL; }
    }
    if( num_trans != NULL ) {
      *num_trans = info_ptr->num_trans;
      retval |= PNG_INFO_tRNS;
    }
  }
  return ( retval );
}
#endif

#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
png_uint_32 PNGAPI
png_get_unknown_chunks( png_structp png_ptr, png_infop info_ptr,
                        png_unknown_chunkpp unknowns ) {
  if( png_ptr != NULL && info_ptr != NULL && unknowns != NULL ) {
    *unknowns = info_ptr->unknown_chunks;
  }
  return ( ( png_uint_32 )info_ptr->unknown_chunks_num );
}
#endif

#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
png_byte PNGAPI
png_get_rgb_to_gray_status( png_structp png_ptr ) {
  return ( png_byte )( png_ptr ? png_ptr->rgb_to_gray_status : 0 );
}
#endif

#if defined(PNG_USER_CHUNKS_SUPPORTED)
png_voidp PNGAPI
png_get_user_chunk_ptr( png_structp png_ptr ) {
  return ( png_ptr ? png_ptr->user_chunk_ptr : NULL );
}
#endif

#ifdef PNG_WRITE_SUPPORTED
png_uint_32 PNGAPI
png_get_compression_buffer_size( png_structp png_ptr ) {
  return ( png_uint_32 )( png_ptr ? png_ptr->zbuf_size : 0L );
}
#endif

#ifndef PNG_1_0_X
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
png_uint_32 PNGAPI
png_get_asm_flags( png_structp png_ptr ) {
  return ( png_uint_32 )( png_ptr ? png_ptr->asm_flags : 0L );
}

png_uint_32 PNGAPI
png_get_asm_flagmask( int flag_select ) {
  png_uint_32 settable_asm_flags = 0;
  if( flag_select & PNG_SELECT_READ )
    settable_asm_flags |=
      PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  |
      PNG_ASM_FLAG_MMX_READ_INTERLACE    |
      PNG_ASM_FLAG_MMX_READ_FILTER_SUB   |
      PNG_ASM_FLAG_MMX_READ_FILTER_UP    |
      PNG_ASM_FLAG_MMX_READ_FILTER_AVG   |
      PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
  return settable_asm_flags;
}
#endif


#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
png_uint_32 PNGAPI
png_get_mmx_flagmask( int flag_select, int *compilerID ) {
  png_uint_32 settable_mmx_flags = 0;
  if( flag_select & PNG_SELECT_READ )
    settable_mmx_flags |=
      PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  |
      PNG_ASM_FLAG_MMX_READ_INTERLACE    |
      PNG_ASM_FLAG_MMX_READ_FILTER_SUB   |
      PNG_ASM_FLAG_MMX_READ_FILTER_UP    |
      PNG_ASM_FLAG_MMX_READ_FILTER_AVG   |
      PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
  if( compilerID != NULL ) {
    #ifdef PNG_USE_PNGVCRD
    *compilerID = 1;    /* MSVC */
    #else
    #ifdef PNG_USE_PNGGCCRD
    *compilerID = 2;    /* gcc/gas */
    #else
    *compilerID = -1;   /* unknown (i.e., no asm/MMX code compiled) */
    #endif
    #endif
  }
  return settable_mmx_flags;  /* _theoretically_ settable capabilities only */
}

png_byte PNGAPI
png_get_mmx_bitdepth_threshold( png_structp png_ptr ) {
  return ( png_byte )( png_ptr ? png_ptr->mmx_bitdepth_threshold : 0 );
}

/* this function was added to libpng 1.2.0 */
png_uint_32 PNGAPI
png_get_mmx_rowbytes_threshold( png_structp png_ptr ) {
  return ( png_uint_32 )( png_ptr ? png_ptr->mmx_rowbytes_threshold : 0L );
}
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */

#ifdef PNG_SET_USER_LIMITS_SUPPORTED
/* these functions were added to libpng 1.2.6 */
png_uint_32 PNGAPI
png_get_user_width_max( png_structp png_ptr ) {
  return ( png_ptr ? png_ptr->user_width_max : 0 );
}
png_uint_32 PNGAPI
png_get_user_height_max( png_structp png_ptr ) {
  return ( png_ptr ? png_ptr->user_height_max : 0 );
}
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */

#endif /* ?PNG_1_0_X */
